What is the BLN mod?
The BLN mod turns the touchkey backlights into a notification led.
It enables the notification led api for any android application that supports notifications by led.
If you dont have the BLN mod installed, the app provides you instructions how to install the BLN mod.

What does this app?
This application gives you control over the BacklightNotification (bln) mod settings on your phone.

The price for the Pro version is 0.99€ (~ 1.99 US$).
The Pro version is available at the android market (creditcard) and at androidpit (paypal, clickandbuy).

If you find an issue, please report it here in the thread.

Which features will be added to future Pro versions?

suggest me a feature

What permissions are used for which features?

RECEIVE_BOOT_COMPLETED: to activate BLN at boot and start the services

INTERNET: for update notification (new BLN app, liblights or kernel releases - you can disable the notification in the update settings) and for the compatibility check (the app receive instructions for you, if the app detects that something is wrong with the BLN setup)

READ_PHONE_STATE: to detect if an incoming call could become a missed call

The initial translations into Dutch, French, Russian and Spanish have been realized at crowdin.net with the help of adequacy, andifds, elroy911, HERVEG, HTCDevil, Jaax, jbnitro, ravexx, Rebel2k and Shaymelmed. Thank you.
The translations into Japanese, Korean and Swedish have been realized at icanlocalize.com.

any other apps:
ask the author of the app for notification led support

The led notification is enabled in app xyz, but it still dont work, why?
This only a problem of Android >= 2.3. Led notifications in Android >= 2.3 do only work if the screen is powered off. You can not trigger a led notification while the screen is powered on and any led notification is automatically dismissed if the screen becomes powered on. This is a general "problem" of all gingerbread phones. This behavior is a design decision of the asop team and they think this is not important enough to be mentioned in the Android SDK documentation. The BLN control app has a workaround implemented for the internal call, locale/tasker plug-in & test notification. Any other apps may have also a option to disable the screen before these apps try to trigger led notifications (e.g. Go SMS).

How much does this modification affect battery life?
With backlight notification permanently powered on, the battery lasts around 82 hours (around 3,5 days, 1,22% per hour). This means, that activated backlights will increase battery usage by about 0,18% per hour. If there is no backlight notification ongoing, battery life is normal (around 96 hours, 1,04% per hour). Measurements were made on a i9000 (eclair) with enabled flight mode.

The sgs2 does currently (6th august 2011) rely on a kernel wakelock, that does affect the battery more than on other phones.
This is an exception from the general bln behavior and may hopefully change in future.

Could you add a fade feature?
That is only possible on some phones, most hardware is limited (by controller firmware) to simple on/off. Maybe I add these capability in the future.

The blinking or the missed call notification of the pro app are not reliably working, what is wrong?
The lowmemorykiller of your phone is configured with too aggressive settings, thereby the app services are killed and not restarted.
Either you use less aggressive settings or you have to live with the fact that your settings make things unreliable.
Btw, it is better to have less free ram in android. A lot of free ram on a android device indicates that it is inefficiently working.

Just a wild guess but the prox sensor might drain more power than the touch buttons

Yes, i will try to implement that the promxity sensor status get polled only every few minutes, that should consume less energy.
But this feature is still on the todo-list, other features have higher priority.

Can we forget about seperate applications for missed calls and calendar events with this application or will we always need to count on third party solutions?

That's the biggest downside for me especially as there seems not to be any calendar solution that would be invisible to user, instead they all want to display their own calendar interface when LED is configured to be used.

Can we forget about seperate applications for missed calls and calendar events with this application or will we always need to count on third party solutions?

That's the biggest downside for me especially as there seems not to be any calendar solution that would be invisible to user, instead they all want to display their own calendar interface when LED is configured to be used.

My plan is that this app can detect calendar and call notfications. And beside that you should be able to enable/disable led notification for the other touchwiz apps, that already support led notifications.
But that is not implemented yet.

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